Clock



FIG. 1 is a bottom view of a clock incorporating my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines shown in FIG. 1 are for illustrative purposes only anddo not form part of the claimed design.

The ornamental design for a clock, as shown and described.